/* 真好查 · 抹茶绿 · 简洁科技风 */
:root {
  --matcha-900: #06261a;
  --matcha-800: #0a3d26;
  --matcha-700: #007a3d;
  --matcha-600: #00994c;
  --matcha-500: #1fae64;
  --matcha-400: #5fc993;
  --matcha-300: #9cdfbb;
  --matcha-200: #c9eed9;
  --matcha-100: #e4f6ec;
  --matcha-50:  #f2fbf6;

  --bg: #fbfbfa;
  --tint: #f4f4f2;
  --surface: #ffffff;
  --ink: #1a1c19;
  --ink-2: #4b4f49;
  --ink-3: #7c807a;
  --line: #e6e6e2;

  --radius-lg: 28px;
  --radius: 20px;
  --radius-sm: 12px;
  --shadow: 0 1px 2px rgba(24, 26, 22, .06), 0 12px 40px -12px rgba(24, 26, 22, .18);
  --shadow-lg: 0 2px 4px rgba(24, 26, 22, .06), 0 30px 60px -20px rgba(24, 26, 22, .35);

  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 var(--font);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.2; letter-spacing: -.01em; font-weight: 700; }
p { margin: 0; }

.wrap { width: min(1200px, 100% - 48px); margin-inline: auto; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--matcha-700); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 16px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 26px; border-radius: 999px;
  background: var(--matcha-600); color: #fff; font-weight: 600; font-size: 15px;
  transition: background .2s, transform .2s, box-shadow .2s;
  white-space: nowrap;
}
.btn:hover { background: var(--matcha-700); transform: translateY(-1px); box-shadow: 0 10px 24px -10px rgba(0, 122, 61, .6); }
.btn--sm { height: 40px; padding: 0 20px; font-size: 14px; }
.btn--ghost { background: transparent; color: var(--matcha-700); box-shadow: inset 0 0 0 1.5px var(--matcha-400); }
.btn--ghost:hover { background: var(--matcha-100); color: var(--matcha-800); box-shadow: inset 0 0 0 1.5px var(--matcha-400); }
.btn--light { background: #fff; color: var(--matcha-800); }
.btn--light:hover { background: var(--matcha-100); }
.btn--outline-light { background: transparent; color: #fff; box-shadow: inset 0 0 0 1.5px rgba(255,255,255,.45); }
.btn--outline-light:hover { background: rgba(255,255,255,.1); }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.nav.is-scrolled { border-bottom-color: var(--line); }
.nav__inner { display: flex; align-items: center; gap: 32px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: .06em; color: var(--matcha-800); }
.brand img { width: 36px; height: 36px; mix-blend-mode: multiply; }
.nav__links { display: flex; gap: 28px; margin-left: auto; font-size: 15px; color: var(--ink-2); }
.nav__links a { position: relative; padding: 6px 0; transition: color .2s; }
.nav__links a:hover { color: var(--matcha-700); }
.nav__links a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; border-radius: 2px; background: var(--matcha-500); transform: scaleX(0); transition: transform .2s; }
.nav__links a:hover::after { transform: scaleX(1); }
.nav__toggle { display: none; }

/* ---------- Common ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: .12em; color: var(--matcha-600);
  margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 18px; height: 2px; border-radius: 2px; background: currentColor; }
.eyebrow--plain::before { display: none; }
.lead { font-size: 18px; color: var(--ink-2); max-width: 40em; }
.lead strong { color: var(--matcha-700); font-weight: 600; }

.section { padding: 120px 0; }
.section--tint { background: var(--tint); border-block: 1px solid var(--line); }
.section--flush { padding-top: 0; border-top: 0; }
.section:has(+ .section--flush) { border-bottom: 0; }
.section__head { margin-bottom: 56px; display: grid; gap: 4px; max-width: 760px; }
.section__head h2 { font-size: clamp(30px, 4vw, 46px); margin-bottom: 18px; }
.section__head--center { text-align: center; margin-inline: auto; justify-items: center; }
.section__head--wide { max-width: 960px; }
.section__head--wide .lead { max-width: none; }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 96px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(600px 400px at 85% 10%, rgba(95, 201, 147, .10), transparent 70%);
}
.hero__intro { max-width: 880px; margin: 0 auto 56px; text-align: center; display: grid; justify-items: center; }
.hero h1 { font-size: clamp(38px, 5.4vw, 64px); margin-bottom: 24px; }
.hero__intro .lead { margin-inline: auto; }
.hero__cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 36px; }
.hero__duo { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.duo {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 32px; display: flex; flex-direction: column; box-shadow: var(--shadow);
}
.duo__head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 10px; }
.duo__head h2 { font-size: clamp(28px, 3vw, 38px); color: var(--matcha-800); }
.duo__head p { font-size: 14px; color: var(--matcha-700); background: var(--matcha-100); border: 1px solid var(--matcha-200); padding: 4px 14px; border-radius: 999px; }
.duo__head strong { font-weight: 700; }
.duo__desc { color: var(--ink-2); margin-bottom: 24px; }
.duo__visual { margin: 0; }
.duo__visual svg { width: 100%; height: auto; border-radius: var(--radius); }
.duo__more { margin-top: 20px; font-weight: 600; color: var(--matcha-600); align-self: flex-start; }
.duo__more:hover { color: var(--matcha-800); }
.tags { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags--center { justify-content: center; margin-top: 40px; }
.tags li { font-size: 13px; color: var(--ink-2); background: var(--surface); border: 1px solid var(--line); padding: 4px 12px; border-radius: 999px; }

/* SVG illustration tokens */
.v-bg { fill: #f1f2ef; }
.v-grid path { stroke: rgba(24, 26, 22, .06); fill: none; }
.v-bg-dark { fill: #1c1e1b; }
.v-grid-dark path { stroke: rgba(255, 255, 255, .05); fill: none; }
.v-label { font: 600 10px var(--mono); fill: var(--matcha-700); letter-spacing: .08em; }
.v-ok { font: 700 15px var(--font); fill: var(--matcha-800); }
.v-small { font: 400 11px var(--font); fill: var(--ink-3); }
.v-strong { font: 600 13px var(--font); fill: var(--matcha-800); }
.v-tag { font: 700 12px var(--mono); fill: var(--matcha-400); letter-spacing: .14em; }
.v-mono { font: 700 14px var(--mono); fill: var(--matcha-400); letter-spacing: .1em; }
.v-card { filter: drop-shadow(0 10px 18px rgba(24, 26, 22, .18)); }
.mc { color: var(--matcha-800); }
.mc-etch { color: #1c3628; opacity: .85; }
.beam { fill: #8ff0bd; filter: drop-shadow(0 0 6px #4fe39a) drop-shadow(0 0 14px rgba(79, 227, 154, .7)); animation: beam 1.2s ease-in-out infinite; }
.glow { fill: rgba(168, 240, 201, .55); filter: blur(4px); animation: glow 1.2s ease-in-out infinite; }
.blink { animation: blink 1.6s steps(2, jump-none) infinite; }
.sparks circle { animation: spark 0.9s ease-out infinite; }
.sparks circle:nth-child(2) { animation-delay: .2s; }
.sparks circle:nth-child(3) { animation-delay: .45s; }
.sparks circle:nth-child(4) { animation-delay: .65s; }
.scanline { animation: scan 2.4s ease-in-out infinite; filter: drop-shadow(0 0 6px #4fd68f); }
.float-card { animation: float 5s ease-in-out infinite; }
.boxes { animation: convey 3.2s linear infinite; }
.belt path { animation: belt .6s linear infinite; }

@keyframes beam { 0%,100% { opacity: .95; } 50% { opacity: .55; } }
@keyframes glow { 0%,100% { opacity: 1; } 50% { opacity: .5; } }
@keyframes blink { 0% { opacity: 1; } 100% { opacity: .3; } }
@keyframes spark { 0% { opacity: 1; transform: translate(0, 0); } 100% { opacity: 0; transform: translate(0, -10px); } }
@keyframes scan { 0%,100% { transform: translateY(0); } 50% { transform: translateY(112px); } }
@keyframes float { 0%,100% { transform: translate(338px, 34px); } 50% { transform: translate(338px, 26px); } }
@keyframes convey { from { transform: translateX(0); } to { transform: translateX(240px); } }
@keyframes belt { to { stroke-dashoffset: -32; } }

/* 产品特点：AI 大数据监控大屏 */
.v-dash-h { font: 700 16px var(--font); fill: #e9f5ee; }
.v-dash-k { font: 500 12px var(--font); fill: #8f968c; }
.v-dash-n { font: 800 24px var(--font); fill: #e9f5ee; letter-spacing: -.01em; }
.v-dash-n--warn { fill: #ff7a59; }
.v-dash-alert { font: 700 13px var(--font); fill: #d9482a; }
.v-dash-msg { font: 600 12px var(--font); fill: var(--ink); }
.v-dash-btn { font: 600 12px var(--font); fill: #fff; }
.v-node { fill: rgba(79, 214, 143, .25); stroke: #4fd68f; stroke-width: 1.5; }
.v-pulse { fill: rgba(255, 122, 89, .25); stroke: #ff7a59; stroke-width: 1.5; transform-box: fill-box; transform-origin: center; animation: pulse 1.6s ease-out infinite; }
.v-flow { animation: belt .8s linear infinite; }
.v-alert { filter: drop-shadow(0 6px 14px rgba(255, 122, 89, .25)); }
@keyframes pulse { 0% { transform: scale(.6); opacity: 1; } 100% { transform: scale(1.8); opacity: 0; } }

/* ---------- Stats ---------- */
.stats { border-block: 1px solid var(--line); background: var(--surface); }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stats__grid > div { padding: 36px 24px; display: grid; gap: 6px; justify-items: center; text-align: center; border-left: 1px solid var(--line); }
.stats__grid > div:first-child { border-left: 0; }
.stats strong { font-size: 40px; line-height: 1; font-weight: 800; color: var(--matcha-700); letter-spacing: -.02em; }
.stats strong small { font-size: 20px; font-weight: 700; }
.stats span { font-size: 14px; color: var(--ink-3); }

/* ---------- Scenes ---------- */
.cards-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.scene { margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); }
.scene svg { width: 100%; height: auto; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.scene figcaption { padding: 22px 26px 26px; color: var(--ink-2); font-size: 15px; }
.scene figcaption strong { display: block; font-size: 18px; color: var(--ink); margin-bottom: 4px; }
.scene--wide { margin-bottom: 40px; }
.scene--dash { margin-bottom: 0; }
.scene--dash svg { border-radius: var(--radius-lg); }

/* ---------- Compare (overlay) ---------- */
.compare-row { display: grid; grid-template-columns: 1.35fr 1fr; gap: 64px; align-items: center; }
.compare-row + .compare-row { margin-top: 110px; }
.compare-row--rev { grid-template-columns: 1fr 1.1fr; }

.compare { position: relative; margin: 0; aspect-ratio: var(--ratio); }
/* 加密后图片左上角起点位于加密前图片中心（向右下各偏移 50%） */
.compare__item { position: absolute; width: 66.6667%; border-radius: var(--radius); overflow: hidden; }
.compare__item img { width: 100%; height: auto; border-radius: inherit; }
.compare__item--before { left: 0; top: 0; box-shadow: var(--shadow); }
.compare__item--after { left: 33.3333%; top: 33.3333%; box-shadow: var(--shadow-lg); outline: 6px solid var(--bg); }
.section--tint .compare__item--after { outline-color: var(--tint); }
.compare figcaption { position: absolute; left: 0; bottom: 0; width: 30%; font-size: 13px; color: var(--ink-3); line-height: 1.6; }
.compare--square figcaption { width: 30%; }

.chip {
  position: absolute; left: 14px; top: 14px;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: rgba(255, 255, 255, .88); color: var(--ink);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.chip--solid { background: var(--matcha-600); color: #fff; left: auto; right: 14px; top: auto; bottom: 14px; }
.chip svg { width: 14px; height: 14px; }

.steps { list-style: none; counter-reset: s; margin: 0; padding: 0; display: grid; gap: 4px; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 44px 1fr; column-gap: 16px; padding: 18px 0; border-bottom: 1px dashed var(--line); }
.steps li:last-child { border-bottom: 0; }
.steps li::before {
  content: counter(s, decimal-leading-zero); grid-row: span 2;
  width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--line); color: var(--matcha-600); font: 700 14px var(--mono);
}
.steps b { font-size: 17px; }
.steps span { color: var(--ink-3); font-size: 14px; }

.compare-side h3 { font-size: 28px; margin-bottom: 16px; }
.compare-side > p { color: var(--ink-2); margin-bottom: 24px; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checks li { position: relative; padding-left: 32px; color: var(--ink-2); }
.checks li::before {
  content: ""; position: absolute; left: 0; top: 4px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--matcha-600) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M6 10.5l2.6 2.6L14 7.6' fill='none' stroke='%23fff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/100% no-repeat;
}

/* ---------- Flow ---------- */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.flow > div { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px; display: grid; gap: 2px; }
.flow > div:not(:last-child)::after {
  content: ""; position: absolute; right: -10px; top: 50%; width: 8px; height: 8px; z-index: 1;
  border-top: 2px solid var(--matcha-400); border-right: 2px solid var(--matcha-400); transform: translateY(-50%) rotate(45deg);
}
.flow i { font: 700 12px var(--mono); font-style: normal; color: var(--matcha-500); margin-bottom: 6px; }
.flow b { font-size: 17px; }
.flow span { font-size: 13px; color: var(--ink-3); }
.flow > div:last-child { background: var(--matcha-600); border-color: var(--matcha-600); color: #fff; }
.flow > div:last-child i, .flow > div:last-child span { color: var(--matcha-200); }

/* ---------- Cases ---------- */
.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px 28px; transition: transform .25s, box-shadow .25s, border-color .25s; }
.case:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--matcha-300); }
.case__tag { display: inline-block; font: 600 12px var(--mono); letter-spacing: .04em; color: var(--matcha-700); background: var(--matcha-100); border-radius: 999px; padding: 5px 12px; margin-bottom: 20px; }
.case h3 { font-size: 21px; margin-bottom: 14px; }
.case ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.case li { position: relative; padding-left: 18px; color: var(--ink-2); font-size: 15px; }
.case li::before { content: ""; position: absolute; left: 0; top: .6em; width: 7px; height: 7px; border-radius: 50%; background: var(--matcha-500); }

/* ---------- Features ---------- */
.highlights { display: grid; gap: 28px; margin-bottom: 112px; }
/* 横排卡片：配图一侧、文字一侧；--rev 配图在右 */
.scene--row { display: grid; grid-template-columns: 1.15fr 1fr; align-items: center; }
.scene--row > svg, .scene--row > .scene__media { border-radius: 0; }
.scene--rev { grid-template-columns: 1fr 1.15fr; }
.scene--rev > svg, .scene--rev > .scene__media { order: 2; }
.scene--row figcaption { padding: 40px 56px; font-size: 18px; line-height: 1.8; }
.scene--row figcaption strong { font-size: clamp(26px, 3vw, 36px); line-height: 1.25; margin-bottom: 16px; }
.scene__media { position: relative; aspect-ratio: 600 / 420; background: #fff; }
.scene__media img { position: absolute; inset: 6% 8%; width: 84%; height: 88%; object-fit: contain; mix-blend-mode: multiply; }
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 112px; }
.feature { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px 28px; transition: transform .25s, box-shadow .25s; }
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.feature__icon { width: 60px; height: 60px; border-radius: 18px; background: var(--matcha-100); display: grid; place-items: center; margin-bottom: 26px; }
.feature__icon svg { width: 30px; height: 30px; fill: none; stroke: var(--matcha-600); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.feature h3 { font-size: 21px; margin-bottom: 12px; }
.feature p { color: var(--ink-2); font-size: 15px; }
.packaging { margin-bottom: 112px; }

/* ---------- Industries ---------- */
.industries { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.industries li { border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; text-align: center; font-weight: 600; font-size: 17px; background: var(--surface); position: relative; overflow: hidden; transition: border-color .2s, color .2s; }
.industries li::before { content: ""; position: absolute; right: -14px; bottom: -14px; width: 48px; height: 48px; background: var(--tint); border-radius: 50%; transition: transform .3s; }
.industries li:hover { border-color: var(--matcha-400); color: var(--matcha-700); }
.industries li:hover::before { transform: scale(1.6); background: var(--matcha-100); }

/* ---------- FAQ ---------- */
.faq { display: grid; grid-template-columns: 1fr 1.6fr; gap: 64px; align-items: start; }
.faq .section__head { margin-bottom: 0; }
.faq__list { display: grid; gap: 12px; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 0 26px; }
.faq summary { list-style: none; cursor: pointer; padding: 22px 0; font-weight: 600; font-size: 17px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 22px; font-weight: 400; color: var(--matcha-600); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding-bottom: 22px; color: var(--ink-2); }

/* ---------- CTA ---------- */
.cta { padding: 96px 0; }
.cta__inner {
  background: var(--matcha-800); color: #fff; border-radius: 36px; padding: 64px;
  display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap;
  position: relative; overflow: hidden;
}
.cta__inner::before {
  content: ""; position: absolute; right: -80px; top: -80px; width: 360px; height: 360px; border-radius: 50%;
  background: radial-gradient(circle, rgba(95, 201, 147, .35), transparent 70%);
}
.cta h2 { font-size: clamp(28px, 3.6vw, 40px); margin-bottom: 12px; }
.cta p { color: var(--matcha-200); }
.cta__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; position: relative; }
.cta__wx { margin: 0; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.cta__wx img { width: 120px; height: auto; border-radius: 12px; background: #fff; padding: 6px; }
.cta__wx figcaption { font-size: 13px; color: var(--matcha-200); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 48px 0; }
.footer__inner { display: grid; grid-template-columns: 1fr auto; gap: 24px 48px; align-items: center; }
.footer__brand { display: flex; gap: 18px; align-items: center; }
.footer__brand img { border-radius: 18px; }
.footer__brand p { color: var(--ink-3); font-size: 14px; }
.footer__nav { display: flex; gap: 24px; font-size: 14px; color: var(--ink-2); flex-wrap: wrap; }
.footer__nav a:hover { color: var(--matcha-700); }
.footer__copy { grid-column: 1 / -1; font-size: 13px; color: var(--ink-3); border-top: 1px solid var(--line); padding-top: 20px; }

/* ---------- Reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero__duo, .compare-row, .compare-row--rev, .faq { grid-template-columns: 1fr; gap: 48px; }
  .compare-row--rev .compare { order: -1; }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .flow > div::after { display: none; }
  .features { grid-template-columns: 1fr 1fr; }
  .cases { grid-template-columns: 1fr; }
  .industries { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .wrap { width: calc(100% - 32px); }
  .nav__links {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 16px 16px;
    transform: translateY(-8px); opacity: 0; pointer-events: none; transition: .2s;
  }
  .nav__links a { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .nav__links a::after { display: none; }
  .nav.is-open .nav__links { transform: none; opacity: 1; pointer-events: auto; }
  .nav__inner > .btn { margin-left: auto; }
  .nav__toggle {
    display: grid; gap: 6px; place-content: center; width: 40px; height: 40px;
    border: 1px solid var(--line); border-radius: 12px; background: var(--surface); cursor: pointer;
  }
  .nav__toggle span { width: 18px; height: 2px; border-radius: 2px; background: var(--ink); transition: .2s; }
  .nav.is-open .nav__toggle span:first-child { transform: translateY(4px) rotate(45deg); }
  .nav.is-open .nav__toggle span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .nav__inner { gap: 12px; }

  .section { padding: 80px 0; }
  .section--flush { padding-top: 0; }
  .hero { padding: 40px 0 64px; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .stats__grid > div { padding: 24px 16px; border-left: 0; }
  .stats__grid > div:nth-child(even) { border-left: 1px solid var(--line); }
  .stats__grid > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .stats strong { font-size: 30px; }
  .cards-2, .features, .scene--row { grid-template-columns: 1fr; }
  .scene--rev > svg, .scene--rev > .scene__media { order: 0; }
  .scene--row figcaption { padding: 24px 26px 28px; font-size: 15px; }
  .scene--row figcaption strong { font-size: 24px; margin-bottom: 8px; }
  .features, .packaging, .highlights { margin-bottom: 72px; }
  .section__head--wide br { display: none; }
  .duo { padding: 22px; }
  .hero__intro { margin-bottom: 36px; }
  .flow { grid-template-columns: 1fr 1fr; }
  .flow > div:last-child { grid-column: 1 / -1; }
  .compare { margin-bottom: 40px; }
  .compare figcaption { position: absolute; top: 100%; width: 100%; padding-top: 14px; }
  .compare__item--after { outline-width: 4px; }
  .chip { font-size: 12px; padding: 3px 10px; left: 10px; top: 10px; }
  .chip--solid { left: auto; top: auto; right: 10px; bottom: 10px; }
  .scene--wide svg { height: 260px; }
  .scene--dash svg { height: auto; }
  .cta__inner { padding: 40px 28px; border-radius: 28px; }
  .footer__inner { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; }
}

/* 一图一物：识图神经网络（选择器需直接命中 <symbol> 内元素，<use> 的祖先选择器无法穿透） */
.nn-line { fill: none; stroke: #c8ffe1; stroke-width: .9; opacity: .8; }
.nn-pulse { fill: none; stroke: #fff; stroke-width: 1.6; stroke-linecap: round; stroke-dasharray: 14 120; animation: nnPulse 2.4s linear infinite; }
.nn-halo { fill: #a8f0c9; opacity: .3; animation: nnHalo 2s ease-in-out infinite; }
.nn-node { fill: #e4fff0; stroke: var(--matcha-500); stroke-width: .8; }
.nn--dim { opacity: .55; }
@keyframes nnPulse { from { stroke-dashoffset: 134; } to { stroke-dashoffset: 0; } }
@keyframes nnHalo { 0%,100% { opacity: .15; } 50% { opacity: .45; } }